Doctor Who: Inferno

UNIT is providing security cover at an experimental drilling project at Eastchester, designed to penetrate the Earth's crust and release a previously untapped source of energy. Soon, however, the drill head starts to leak an oily green liquid that transforms those who touch it into vicious primeval creatures with a craving for heat. The Doctor is accidentally transported "sideways in time" by the partially repaired TARDIS control console into a parallel universe where the drilling project is at a more advanced stage. Thwarted by his friends' ruthless alter egos, he works to save both universes.

Director: Douglas Camfield

Cast: Jon Pertwee, Caroline John, Nicholas Courtney, John Levene, Olaf Pooley, Christopher Benjamin, Sheila Dunn, Derek Newark

Audience-only score — full critic data not yet in the ReelXO vault.